Stapling machine



Nov. 14, 1950 D. D. CORWIN STAPLING MACHINE Filed April 30. 19493maentor Gttomeg;

Patented Nov. 14, 1950 UNITED STATES PATENT OFFICE STAPLING MACHINE 7'Dorsey D. Corwin. Kansas City, Mo. Application April 30, 1949, SerialNil-90.720

This invention relates to stapling machines machines is limited. by theconnection of the stapling arm to the base of the machine. There havebeen long reach machines which differ primarily in the length of thestapling arm and base from the hinge connecting the rear portionsthereof. The long reach machines are large andawkwarcl and usually areused only for special purposes. They are also very expensive.

The objects of the present invention are to provide a stapling machineadapted for stapling diversified sizes of sheets such as stapling theleaves of a book at the fold thereof without lirhi tation a to the widthof the leaves, yet be small enough for ordinary use in stapling theedges of sheets together; to provide a stapling machine in which thestaple is driven on a line perpendicular to the axis of the hingeconnecting the stapling arm and base; to provide a stapling machinehaving a T-shaped base and arm hingedly connected together; to provide ahinge adjustment for accommodating various thicknesses of papers to bestapled whereby the staple is driven vertically through the papers inalignment with the anvil onthe base; and to provide ahand staplingmachine involving few and simple parts so constructed and arranged thatit is capable of operating in a more convenient and efiicient mannerupon a wide variety of sizes of work and having unlimited reach adirection-perpendicular to-the staple.

.nIn accomplishing these and other objects of the present invention, Ihave provided-improved details of structure, the preferred forms ofwhich are illustrated in the accompanying drawings;

wherein:

Fig. 1 is a perspective view of a stapling machine embodying thefeatures of thepresent invention and shown in position for stapling bookleaves on the fold line thereof.

Fig. 2 is a perspective View of the stapling machine with the arm inraised position relative to the base.

Fig. 3 is a side elevation of the stapling machine with portions of thebase broken away to illustrate the spring and its connection with' the 6Claims. (01. 1-3) would be satisfactory.

arm for hinging same use.

Fig. 4 is a plan view of the stapling machine.

Fig. 5 is a transverse sectional view through thehinge pin'connectionfor the base and arm,

. sisting of a base 2, an arm 3 and a conventional staple drivingmechanism 4. Theconventional staple driving mechanism 4 is illustratedas having a plunger 5 at one end thereof to drive the.

staples from within the machine through sheet materials for fasteningsuch materials together or attaching one material to another, thestaples being bent by the well-known anvil 6 carried by the base 2 andhaving grooves or indentations I to bend the legs of the staple intoholding position. The staple driving mechanism illustratedincludes anelongated body 8 having a cover member 9 pivoted as at I0, adjacent theopposite end, to the plunger 5, said cover enclosing the staples (notshown) which are slidably'arranged in the body member with suitablespring tension to feed said staples under the plunger whereby eachoperation of said plunger drives a staple; The cover 9 is secured inclosed position by a suitable latch H. S g I The particular operatingstructure of the staple driving mechanism 4 is not illustrated ordescribed as any suitable conventional structure The body member 8 issuitably secured as at [2 to the end of the -arm.3, said arm preferablybeing perpendicular to the body member in spaced relation to the plunger5. The arm 3 extends from the body member 8 and i preferably bent fromsheet metal or other suitable material to form .a hollow structure oflight weight, the free end of the arm having a bearing block 13 slidablymounted between the sides [4 of said arm, said bearing block havingabore I5 which aligns with slots [6 in the side walls, I4 to rotatablyreceive a pin I1 extending through and suittop wall 24, whereby saidscrew is rotatably mounted in said wall and rotation of said screwupwardly when not in threads the shank 2! into or out of the threadedbore 22 to move the bearing block toward or away from the upper wall 24and adjust the relative spacing of the base and arm.

The base 2 is illustrated as being formed of metal but may be of anyother suitable material, said base being substantially T-shaped, havinga leg 21 under and in vertical alignment with the arm 3 and a crossportion 28 of the T under the staple driving mechanism 4. The basepreferably has an upper wall 29 and downwardly and outwardly slopingside walls 30 whereby the bottom is hollow to reduce the weight of themachine. The upstanding ears 19 are arranged adjacent the free end ofthe leg 21 and are shown as being on a U-shaped member 3| having a barportion 32 positioned under the upper wall 29 of the base with the earsextending through slots 33 in said wall. The base portion 32 has anaperture 34 aligning with an aperture 35 in said wall 29 to receive arivet 36' which secures the U-shaped member to the base. The wall 29, ofthe base is slotted as at 31 between the ears l9 adjacent the end of thearm 3 whereby a portion of saidarm is turned downwardly to form a tab 38extending into the hollowed out portion of the base. One end 39 of aspring 40 is secured to said tab with the other end 4| of said springsuitably secured to the base in spaced relation to the tab as on a hook42 pressed from the upper wall 29 of the base whereby the tension of thespring 40 exerts pressure on the tab 38 tending to move same toward thecross of the T, thereby pivoting the arm 3 upwardly to raise the stapledriving mechanism 4 from the cross portion 28 of the base member.

The'anvil 6 is preferably slidably mounted on the base adjacent one endof the cross portion 28, whereby said anvil may be moved to aligndifferent shaped grooves I with the legs of the staple driven by theplunger 5.

In operating a stapling machine constructed as described, the latch H isreleased to permit raising of the cover 9 and insertion of aconventional clip of staples into the body portion 8. The cover 9 isthen closed and latched in position, the spring 40 holds the arm3 at theupper limit. of its movement whereby the bottom of the body portion 8 isspaced above the upper wall 29 of the base. Sheets of material, forexample a sheaf of book leaves 43, is inserted between the body member 8and the base with the fold line 44 of said leaves in alignment with thestaple under the plunger 5. As illustrated in Fig. 1, the width of theleaves may be unlimited as there is no projection or other obstructionbetween the body 8 and the base. The arm 3 is then pivoted downwardly onthe pin I! to engage the bottom of the body member 8 with the uppersurface of the book leaves, then by striking the plunger with the hand.to move said plunger downwardly, the staple is driven into the fold lineof the leaves whereby the legs of the staple are driven through theleaves and the ends bent by the grooves l in the anvil 6. The staple maybe spaced from the ends 45 of the sheets, the only limitation of saiddistance being the length of the arm 3 whereby the greatest distancefrom the end edges is when said edges 45 are engaged with the ears 19.Obviously the staples may be driven adjacent an edge of paper or asotherwise usually positioned by arranging said edges under the plungerportion as desired.

Since the pivoted movement of the arm tends to tilt the staple drivingmechanism 4 relative to 4 the base it is desirable to move the pivot ofthe. arm 3 relative to the base whereby the bottom of the body member 8is parallel to the surface 29 to accommodate the particular thicknessesof materials being stapled. This is accomplished by turning the screw 20to move the arm 3 relative to the block (3, for example, to raise saidarm for stapling a body of sheets having considerable thickness. Theraising of the arm relative to the block, in effect, raises the bottomof the arm and body member from the upper surface 29 of the base wherebythe bottom of the body member 8 will lie fiat on the sheets beingstapled.

It is believed obvious that I have provided a stapling machine which maybe used for stapling various sized articles, for example leaves of a'book along fold lines thereof whereby the leaves may be of unlimitedWidth.

What I claim and desire to secure by Letters Patent is:

1. In a stapling device, a substantially T- shaped base, an anviladjacent one end of the cross of the T-shaped base, a staple drivingmechanism spaced above and in alignment with the cross of the T-shapedbase, the discharge of-said staple driving mechanism being in alignmentwith the anvil,-and means on the staple driving mechanism extendinglaterally thereof and having a free end pivoted to the base.

2. In a stapling device, a substantially T- shaped base, an anviladjacent one end of the cross of the T-shaped base, a staple drivingmechanism spaced above and in alignment with the cross of the T-shapedbase, the discharge of said staple driving mechanism being in alignmentwith the anvil, and means on the staple driving mechanism extendinglaterally thereof and having a free end pivoted to the base, the axis ofthe pivot being parallel to the staple driving mechanism.

3. In combination with a staple driving mechanism, an arm rigidlyattached to said staple driving mechanism and extending laterallythereof, a substantially T-shaped base member, the cross and leg thereofunderlying the staple driving mechanism and arm respectively, an anvilmounted on the base in position to receive ends of staples driven fromthe staple driving mechanism, and'means adjacent the free end of the legof the base member for pivotally mounting the free end of the arm.

4. In combination with a staple driving mechanism, an arm rigidlyattached to said staple driving mechanism and extending laterallythereof, a. substantially T-shaped base member, the cross and legportions thereof underlying the staple driving mechanism and armrespectively, an anvil mounted on the base and positioned to receiveends of the staples driven from the staple driving mechanism, means forpivotally mounting the free end of the arm adjacent the end of the legof the base, and resilient means having connection with the base and armfor pivoting the arm upwardly relative to the base.

5. In combination with a staple driving mechanism, an arm rigidlyattached to said staple driving mechanism and extending laterallythereof, a substantially T-shaped base member, the cross and legportions thereof underlying the staple driving mechanism and armrespectively, an anvil mounted on the base and positioned to receiveends of the staples driven from the staple driving mechanism, a pivotpin on the base adjacent the end of the leg thereof, said pin beingparallel to the cross portion of the base member,

a bearing mounted in the free end of the arm for pivotally mounting saidarm on the pivot pin, and resilient means having connection with thebase and arm for pivoting the arm upwardly relative to the base.

6. In combination with a staple driving mechanism, an arm rigidlyattached to said staple driving mechanism and extending laterallythereof, a substantially T-shaped base member, the cross and leg thereofunderlying the staple driving mechanism and arm respectively, an anvilmounted on the base in position to receive ends of staples driven fromthe staple driving mechanism, a pivot pin on the base adjacent the freeend of the leg thereof, said pin being parallel to the cross portion ofthe base member, a bearing adjustably mounted in the free end of the armfor pivotally mounting said arm on the pivot pin, means for adjustingthe position of the bearing in the arm for changing the spacing betweenthe staple driving mechanism and anvil when in parallel relation, andresilient means having connection with the base and arm for pivoting thearm upwardly relative to the base.

DORSEYD. CORWIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

